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WO2016183763A1 - Processeurs audio et vidéo - Google Patents

Processeurs audio et vidéo Download PDF

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Publication number
WO2016183763A1
WO2016183763A1 PCT/CN2015/079154 CN2015079154W WO2016183763A1 WO 2016183763 A1 WO2016183763 A1 WO 2016183763A1 CN 2015079154 W CN2015079154 W CN 2015079154W WO 2016183763 A1 WO2016183763 A1 WO 2016183763A1
Authority
WO
WIPO (PCT)
Prior art keywords
signals
audio
external
video
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/079154
Other languages
English (en)
Inventor
Tao-Sheng CHU
Maureen Min-Chuan LU
Victor Lee
Hsiao-Ping WU
Chan-Liang LIN
Yi-Ling Lo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
Priority to PCT/CN2015/079154 priority Critical patent/WO2016183763A1/fr
Priority to US15/557,026 priority patent/US10846041B2/en
Priority to TW105113655A priority patent/TWI651643B/zh
Publication of WO2016183763A1 publication Critical patent/WO2016183763A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • H04N21/43635—HDMI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/439—Processing of audio elementary streams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/602—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for digital sound signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G06F3/165—Management of the audio stream, e.g. setting of volume, audio stream path
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/04—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
    • G09G2370/045—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller using multiple communication channels, e.g. parallel and serial
    • G09G2370/047—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller using multiple communication channels, e.g. parallel and serial using display data channel standard [DDC] communication
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/20—Details of the management of multiple sources of image data

Definitions

  • the media playing part may be a video output device for displaying video signals.
  • the video output device may be such as a monitor, or a built-in or integrated display of an electronic device, or an external display connected to a computer part of the electronic device via such as a video graphics array (VGA) cable, etc.
  • the media playing part may be an audio output device for playing audio signals, such as sounds and music.
  • the audio output device may be a speaker, a headphone, a stereo, an earphone terminal, a line-out terminal, etc.
  • the media playing part may be a device, such as a television (TV) , which integrates both video output functions and audio output functions.
  • TV television
  • FIG. 1 is a block diagram illustrating an electronic device that shares its media playing part with an external media source in accordance with an example of the present disclosure.
  • FIG. 2 is a block diagram illustrating an electronic device having two control components for sharing a media playing part with an external media source in accordance with an example of the present disclosure.
  • FIG. 3 is a block diagram illustrating an electronic device for sharing audio output devices and video output devices with an external media source in accordance with an example of the present disclosure.
  • FIG. 4 is a block diagram illustrating an electronic device having a high definition multimedia interface (HDMI) input for playing external AV signals from an external media source in accordance with an example of the present disclosure.
  • HDMI high definition multimedia interface
  • FIG. 5 is a block diagram illustrating the structure of an audio block of the electronic device shown in FIG. 4 in accordance with an example of the present disclosure.
  • FIG. 6 presents a power state diagram for an all-in-one electronic device in accordance with an example of the present disclosure.
  • FIG. 7 is a flow chart illustrating an example process of controlling audio parameters via a first control component when external AV signals are played on media playing devices.
  • FIG. 8 is a flow chart illustrating an example process of controlling video parameters via a first control component when external AV signals are played on media playing devices.
  • FIG. 9 is a flow chart illustrating an example process of controlling audio parameters via a second control component when external AV signals are played on media playing devices.
  • FIG. 10 is a flow chart illustrating an example process of controlling video parameters via a second control component when external AV signals are played on media playing devices.
  • FIG. 11 is a flow chart illustrating an example process of controlling audio parameters via a first control component when internal AV signals are played on media playing devices.
  • FIG. 12 is a flow chart illustrating an example process of switching from playing internal AV signals or no display to playing external AV signals.
  • FIG. 13 is a flow chart illustrating an example process of switching from playing external AV signals or no display to playing internal AV signals.
  • FIG. 14 is a block diagram illustrating a system in accordance with an example of the present disclosure.
  • FIG. 15 is a block diagram illustrating a computer readable storage medium in accordance with an example of the present disclosure.
  • a media playing part of the electronic device may not work, as well. That is, the media playing part cannot function separately when the computer part is not powered on.
  • an electronic device may be provided as an example of the present disclosure, which can play audio and video (AV) signals received from external media sources, using its media playing part while its computer part is powered on or powered off. That is, the operation of the media playing part may be independent from that of the computer part.
  • the computer part of the electronic device is powered off may refer to a status that the computer part is not powered on or not functioning.
  • the computer part is powered off may include a status that the computer part is shut down, or the computer part is sleep or standby, or the computer part is suspended, or the computer part is in malfunction.
  • the electronic device may act as a multimedia center capable of playing AV signals even when the computer part is not functioning.
  • a user can view and listen to content of the AV signals received from the external media source on the electronic device's display and through its speaker.
  • the electronic device may be a smartphone, a notebook, a laptop, or an all-in-one personal computer (PC) .
  • the all-in-one PC may integrate the electronic device’s internal components into the same case as a display, eliminating some connecting cables and allowing for a smaller footprint, sometimes giving a degree of portability, compared to the standard desktop configuration having separate cases for the display and the computer part.
  • the computer part may refer to components of the electronic device that can realize general computer functions.
  • the media playing part may refer to components of the electronic device that can realize media playing functions, such as playing audio signals or displaying video signals, or combination thereof.
  • the external media source may be a device separate from the electronic device that can output AV signals.
  • the external media source may be a game console, a set-top box, a media player, a digital television (DTV) , a smart phone, or another electronic device distinct from the electronic device having the media playing part, etc.
  • FIG. 1 is a block diagram illustrating an electronic device 100 that shares its media playing part with an external media source in accordance with an example of the present disclosure.
  • the electronic device 100 may include: an AV processor 101, a computer subsystem 102, a media playing device 103, and a control mechanism 104.
  • the AV processor 101 may include an AV input port 111 to receive external AV signals from an external media source.
  • the external AV signals may be such as a high definition multimedia interface (HDMI) input.
  • the computer subsystem102 may provide internal AV signals to the AV processor 101. To distinct from the external media source, the computer subsystem 102 may be considered as an internal media source.
  • the control mechanism 104 may control the AV processor 101 to select between the external AV signals and the internal AV signals, and enable the AV processor 101 to transmit selected AV signals to the media playing device 103.
  • the media playing device 103 may play the selected AV signals.
  • the selected AV signals may either be the external AV signals, or the internal AV signals.
  • control mechanism 104 may instruct the AV processor 101 to select the external audio and video signals, and the media playing device 103 may play the external audio and video signals. In an example, the control mechanism 104 may instruct the AV processor 101 to select the internal audio and video signals, and the media playing device 103 may play the internal audio and video signals.
  • the media playing device 103 may include a video output device to display video signals, and an audio output device to play audio signals. Accordingly, the control mechanism 104 may instruct the AV processor 101 to select the external audio signals and the internal video signals, and the audio output device is to play the external audio signals, and the video output device is to display the internal video signals. In another example, the control mechanism 104 may instruct the AV processor 101 to select the internal audio signals and the external video signals, and the audio output device is to play the internal audio signals, and the video output device is to display the external video signals.
  • the electronic device 100 may be designed to function as a media playing device 103 for external media sources when the computer subsystem 102 of the electronic device 100 is not powered on. In this way, users don't need to turn on the computer subsystem 102 of the electronic device 100 and wait a relatively longer time to play external audio and video content.
  • FIG. 2 is a block diagram illustrating an electronic device 200 having two control components for sharing a media playing device with an external media source in accordance with an example of the present disclosure.
  • the electronic device 200 may include: an AV processor 201, a computer subsystem 202, a video output device 203, an audio output device 204, a first control component 205, and a second control component 206.
  • the first control component 205 is coupled to the AV processor 201.
  • the first control component 205 is to instruct the AV processor 201 to select between external AV signals and internal AV signals.
  • the external AV signals may be received from the external media source via an AV input port 211.
  • the first control component 205 can control the selection of media sources.
  • the second control component 206 is coupled to the computer subsystem 202 and to instruct the AV processor 201 to select between external AV signals and internal AV signals. When the computer subsystem 202 is not powered on, the second control component 206 may not function.
  • either the first control component 205 or the second control component 206 may adjust audio parameters of the audio output device 204, and to adjust video parameters of the video output device 203.
  • the audio parameters may include such as audio volume value and audio mute status
  • the video parameters may include such as video brightness value.
  • the volume of the audio output device 204 may be turned up or down according to the audio volume value.
  • the audio mute status may be muting (indicated as “off” ) or not mute (indicated as “on” ) of the audio output device 204.
  • FIG. 3 is a block diagram illustrating an electronic device 300 for sharing audio output devices and video output devices with an external media source in accordance with an example of the present disclosure.
  • the electronic device 300 may include: an AV processor 31, a computer subsystem 303, a video output device 304, an audio output device 305, a first control component 306, a second control component 307, and a power supply 308.
  • the AV processor 31 may include: a video multiplexer and control unit 301, an audio multiplexer and control unit 302, an AV splitter 331, and an AV input port 341.
  • the AV input port 341 may receive external AV signals from an external media source.
  • a plurality of AV input ports 341 may be configured on the AV processor 31, to connect multiple external media sources with different AV formats.
  • a possible format of the external media source may be HDMI input.
  • the external AV signals may be transmitted to the AV splitter 331 and split into external audio signals and external video signals.
  • the computer subsystem 303 may include a general purpose processor for handling major computational work of the electronic device 300.
  • the general purpose processor can include any type of processor, including, but not limited to, a microprocessor, a mainframe computer, a digital signal processor, a personal organizer, a device controller, and a computational engine within an appliance.
  • the external video signals may be sent to the video multiplexer and control unit 301.
  • the video multiplexer and control unit 301 may also receive internal video signals from the computer subsystem 303, and provide selected video signals to the video output device 304.
  • the selected video signals may be determined according to control signals sent from either the first control component 306 or the second control component 307.
  • the selected video signals may be one of the external video signals and the internal video signals.
  • the external audio signals may be sent to the audio multiplexer and control unit 302.
  • the audio multiplexer and control unit 302 may also receive internal audio signals from the computer subsystem 303, and provide selected audio signals to the audio output device 305.
  • the selected audio signals may be determined according to control signals sent from either the first control component 306 or the second control component 307.
  • the selected audio signals may be one of the external audio signals and the internal audio signals.
  • the power supply 308 may provide power to other parts of the electronic device 300.
  • the AV processor 31 and the computer subsystem 303 may get power input from the power supply 308 separately, to ensure that the power status of the AV processor 31 may not be affected by that of the computer subsystem 303.
  • the AV processor 31 may be powered on to play an external media source on the video output device 304 and the audio output device 305.
  • FIG. 4 is a block diagram illustrating an electronic device 400 having an HDMI input for playing external AV signals from an external media source in accordance with an example of the present disclosure.
  • the electronic device 400 may include: a scalar subsystem 401, an audio block 402, a central processing unit (CPU) 403, a liquid crystal display (LCD) panel 404, a headphone 405, a speaker 415, an on screen display (OSD) key control 406, a universal serial bus (USB) port 407, an external controller (EC) 408, and a power converter 409.
  • the USB port 407 may connect a keyboard, a touchpad, a mouse, etc.
  • the scalar subsystem 401 may be part of the AV processor 31 for handling audio and video signals.
  • the scalar subsystem 401 may include: a scalar integrated circuit (IC) 411, an OSD overlay 421, and an electrically erasable programmable read-only memory (EEPROM) 431.
  • the scalar IC 411 may provide AV switching capabilities, which can be found inside consumer electronic devices such as televisions, video game consoles, digital video disc (DVD) , or Blu-ray disc players, and can also be found in other AV equipment (such as video editing and television broadcasting equipment) .
  • the OSD overlay 421 may be a software menu for presenting the OSD key control 406 to a user.
  • the scalar subsystem 401 may further include: a mobile high definition link (MHL) voltage converter 441.
  • MHL voltage converter 441 may be used when audio and/or video data are sent from an MHL compatible device (such as a mobile phone, a tablet, etc. ) to a high resolution TV set or a monitor with an HDMI input.
  • the scalar IC 411 may include: an audio out port 451, a power enable general purpose input/output (GPIO) 461, an HDMI receiver 471, and a display converter 481.
  • the display converter 481 is to provide such as an embedded display port (eDP) or low-voltage differential signaling (LVDS) for connections between the scalar IC 411 and the LCD panel 404.
  • the eDP may be a standardized display panel interface for internal connections between such as graphics cards and notebook display panels.
  • a GPIO of the scalar IC 411 may be a generic pin whose behavior, including whether it is an input or output pin, can be controlled by a user at run time.
  • the scalar IC 411 may connect to a multiplexer 491, and provide a source selection indicator to the multiplexer 491 to inform whether an external media source or an internal media source may be selected.
  • the multiplexer 491 may provide brightness control signals to a backlight converter 414, to control brightness of the LCD panel 404.
  • a multiplexer i.e., MUX
  • MUX may be a device that selects one of several analog or digital input signals and forwards the selected input into a single line.
  • the multiplexer may also be called a data selector.
  • the multiplexer 491 may be a 2-channel analog multiplexer.
  • the multiplexer 491 may receive inputs such as video control signals from a platform controller hub (PCH) 433 and the scalar IC 411, and forward a selected input to the LCD panel 404.
  • PCH platform controller hub
  • the connection point between the PCH 433 and the multiplexer 491 is illustrated in FIG. 4 as C.
  • the computer subsystem 303 may include: the CPU 403, a display control unit 413, an operating system (OS) 423, the PCH 433, and a system power button 443.
  • the display control unit 413 may be instructions executable by the CPU 403 for controlling audio and/or video parameters when the computer subsystem 303 is powered on.
  • the PCH 433 may be similar to a south bridge, having south bridge features and managing I/O functions of the south bridge.
  • the PCH 433 is connected to the CPU 403 via a direct media interface (DMI) .
  • D direct media interface
  • the OSD key control 406 may include: a multi-function OSD key, an up key, and a down key.
  • the OSD key control 406 may send control signals to the scalar IC 411, and the connection point between the OSD key control 406 and the scalar IC 411 is illustrated in FIG. 4 as A.
  • the OSD key control 406 may be used to select a media source, and adjust audio parameters and/or video parameters of media playing devices.
  • the electronic device 400 may include: an Infra-Red (IR) receiver 426, to receive control signals from an IR remote control 416, and send the control signals via an Inter-Integrated Circuit (I2C) bus or a Universal Asynchronous Receiver/Transmitter (UART) to a GPIO of the scalar IC 411.
  • I2C Inter-Integrated Circuit
  • UART Universal Asynchronous Receiver/Transmitter
  • FIG. 4 the IR remote control 416 is described as an example for remote control.
  • remote controls are consumer IR devices which send digitally-coded pulses of infrared radiation to control functions such as power, volume, tuning, temperature set point, fan speed, or other features.
  • a remote control is a component of an electronic device such as a television set, DVD player, or other home appliance, used to operate the electronic device wirelessly from a short distance.
  • Remote control is a convenience feature for a consumer, and can allow operation of devices that are out of convenient reach for direct operation of controls.
  • remote control may also include Bluetooth connectivity, motion sensor-enabled capabilities and voice control.
  • the power converter 409 may receive direct currents (DC) from a power adapter 419, and provide power supply to such as the scalar subsystem 401 and the CPU 403.
  • the power adapter 419 is to receive an alternating current (AC) input, and generate a direct current (DC) with 19V for the power converter 409.
  • the power converter 409 may be a DC-to-DC converter, or may be a linear voltage regulator such as a low dropout regulator (LDO) , or may be a metal oxide semiconductor (MOS) gate.
  • the DC-to-DC converter is an electronic circuit which converts a source of direct current (DC) from one voltage level to another according to practical requirements.
  • the power converter 409 may turn 19V into 12V, 5V, 3.3V, 1.5V, 1.1V, etc.
  • the power converter 409 is under the control of the external controller 408 (see connection point F) .
  • the OSD key control 406, the IR remote control 416, and the USB port 407 may be used by a user to select a media source for a media playing device of the electronic device 400.
  • the media playing device may include such as the LCD panel 404, the headphone 405, and the speaker 415.
  • a speaker may be an electromechanical device which produces sound.
  • the speaker 415 may be a woofer speaker, which is a loudspeaker designed to produce low frequency sounds.
  • the speaker 415 may be a tweeter speaker, which is a special type of loudspeaker usually with dome or horn-type. The tweeter speaker may be designed to produce high audio frequencies.
  • the OSD key control 406, the IR remote control 416, and the USB port 407 may adjust audio or video parameters of the media playing device, such as the audio volume of the headphone 405, or the brightness of the LCD panel 404.
  • the first control component 306 may include the OSD key control 406 and the IR remote control 416, which can work when the CPU 403 is powered on or off.
  • the second control component 307 may include the USB port 407, which can work when the CPU 403 is powered on.
  • the scalar IC 411 may send a source selection indicator to the multiplexer 491 and the audio block 402 (see connection point E) , indicating that the media playing device is to play the external media source. Then, the HDMI input may be transmitted to the HDMI receiver 471, and split into audio signals and video signals. The audio signals of the HDMI input may be transmitted to the audio block 402 via the audio out port 451. The video signals of the HDMI input may be transmitted to the LCD panel 404 via the display converter 481.
  • the scalar IC 411 may send a source selection indicator to the multiplexer 491 and the audio block 402 (see connection point E) , indicating that the media playing device is to play the internal media source. Then, the PCH 433 may provide high definition audio (HDA) to the audio block 402. The video signals of the internal media source may be provided by the CPU 403 to the scalar IC 411, and then transmitted to the LCD panel 404 via the display converter 481.
  • HDMI high definition audio
  • Audio control signals generated by the OSD key control 406 and/or the IR remote control 416 may be transmitted via the I2C from the scalar IC 411 to the external controller 408. Then, the external controller 408 may instruct the audio block 402 via the I2C to adjust the audio parameters according to the audio control signals.
  • the scalar IC 411 may receive video control signals such as brightness control signals and panel enable signals from the OSD key control 406 and/or the IR remote control 416, and provide the video control signals to the multiplexer 491 for the internal or external media source.
  • the PCH 433 may provide video parameters of the internal or external media source generated by the second control component 307 to the multiplexer 491 via connection point C.
  • FIG. 5 is a block diagram illustrating the structure of the audio block 402 in accordance with an example of the present disclosure.
  • the audio block 402 may include: an audio multiplexer and control unit 302, a speaker amplifier 503, a headphone amplifier 504, and an audio codec 505.
  • the audio multiplexer and control unit 302 may include: an audio digital signal processing (DSP) 501, and an audio multiplexer 502.
  • DSP digital signal processing
  • Line-out signals from the audio DSP 501 may be external audio signals
  • line-out signals from the audio codec 505 may be internal audio signals.
  • the internal audio signals may be transmitted from the PCH 433 to the audio codec 505.
  • the audio multiplexer 502 may receive either the external audio signals or the internal audio signals under the control of a source selection indicator sent from the scalar subsystem 401, and send the selected audio signals to the headphone amplifier 504 to drive the headphone 405.
  • the audio DSP 501 may receive the external audio signals from the scalar subsystem 401, and receive the internal audio signals from the audio codec 505 via an Inter-IC Sound (I2S) Bus.
  • the audio DSP 501 may select audio signals for the speaker amplifier 503, and send the selected audio signals to the speaker amplifier 503 via the I2S to drive the speaker 415.
  • I2S Inter-IC Sound
  • the external controller 408 may transmit audio control signals to the audio DSP 501, the speaker amplifier 503, and the headphone amplifier 504 via the I2C.
  • the audio control signals may include audio volume value and audio mute status.
  • the audio mute status may be transmitted to the speaker amplifier 503 and the headphone amplifier 504 via a GPIO of the scalar subsystem 401.
  • the audio multiplexer and control unit 302 may be implemented by another audio DSP without using a separate audio multiplexer for the headphone amplifier 504.
  • FIG. 6 presents a power state diagram for an electronic device 300 in accordance with an example of the present disclosure.
  • the electronic device 300 may be an all-in-one computer.
  • the electronic device may be in a G3 state, which represents that the electronic device is mechanical off. In other words, no alternating current (AC) has been supplied to the electronic device in the G3 state.
  • the electronic device may be in a G2 state, which represents that the alternating current is plugged in and there is direct current (DC) transformed from the alternating current.
  • the AV processor 31 and the computer subsystem 303 of the electronic device 300 are both shut down.
  • the G2 state may have AC power consumption no more than 0.5W.
  • the electronic device 300 may be in a G1 state, which represents that the computer subsystem 303 is shut down while the AV processor 31 is sleep or standby. In the G1 state, the AC power consumption may be no more than 4W.
  • the electronic device may be in a G0 state, which represents that both the computer subsystem 303 and the AV processor 31 are powered on.
  • the electronic device may be in a G4 state, which represents that both the computer subsystem 303 and the AV processor 31 are sleep or standby.
  • the electronic device may be in a G5 state, which represents that the computer subsystem 303 is shut down while the AV processor 31 is powered on.
  • the electronic device 300 may be in a G6 state, which represents that the computer subsystem 303 is sleep or standby while the AV processor 31 is powered on.
  • Table 1 illustrates implications of different power states of the electronic device 300.
  • the electronic device 300 may transfer among power states G0-G6.
  • the direct current When the direct current is on, the electronic device may transfer from G3 to G2 (611) .
  • the direct current is off, the electronic device may transfer from G2 to G3 (612) .
  • a power status of the AV processor 31 When a power status of the AV processor 31 is changed from sleep to shut down, the electronic device 300 may transfer from G1 to G2 (613) .
  • a system power button is pressed, the power status of the AV processor 31 changes from sleep to on and a power status of the computer subsystem 303 changes from shut down to powered on, the electronic device 300 may transfer from G1 to G0 (614) .
  • the electronic device 300 may transfer from G4 to G0 (615) .
  • the electronic device may transfer from G2 to G5 (616) .
  • the media playing device may be assigned to the HDMI input, and the electronic device 300 may transfer from G1 to G5 (617) .
  • the electronic device 300 may return to G1 from G5 (618) .
  • the electronic device When the system power button is pressed under the circumstance that the electronic device 300 is within the G5 state, the electronic device may enter into G0 (619) . On the other hand, the electronic device 300 may also change from G0 to G5 on the condition that the computer subsystem 303 is shut down (620) . When the electronic device is previously in the G6 state and a PC wake up event occurs, the electronic device may step into G0 (621) . Accordingly, the electronic device may return from G0 to G6 when the computer subsystem 303 comes into a sleep status (622) . The conversion between G4 and G6 states may be triggered by the detection of the HDMI input (623 and 624) , which may be the same as that described in 617 and 618.
  • the electronic device 300 may transfer from G2 to G0 (625) .
  • the computer subsystem 303 When the computer subsystem 303 is shut down, the electronic device may transfer from G4 to G1 (626) .
  • the electronic device When the electronic device is in G0, G5, G6 states while an input key is pressed, the electronic device may stay in the corresponding states and no transfer happens (627, 628, 629) .
  • the computer subsystem 303 is shut down from sleep and the AV processor 31 remains power on, the electronic device 300 may transfer from G6 to G5 (630) .
  • the electronic device 300 is in a monitor mode.
  • the electronic device is in a PC mode.
  • the monitor mode may refer to a situation that the computer subsystem 303 is powered off, including shut down status and sleep status, while the electronic device 300 can still function as a media playing device.
  • the electronic device in the monitor mode may act as a monitor for external media sources connected to the electronic device via such as an HDMI input.
  • the monitor mode may be dedicated for displaying external media sources.
  • the PC mode may refer to a situation that the computer subsystem 303 is powered on, and the media playing device may receive AV signals from either the computer subsystem 303 or from the HDMI input. In the PC mode, either external media sources or internal media sources may be played.
  • FIG. 7 is a flow chart illustrating an example process 700 of controlling audio parameters via a first control component when external AV signals are played on a media playing device. That is, the selected AV signals illustrated in FIG. 3 are the external AV signals.
  • a scalar subsystem may receive audio control signals from the first control component. In an example, an OSD key may be pressed to generate the audio control signals. In another example, an IR remote control may be applied to generate the audio control signals.
  • the scalar subsystem may issue an interrupt command to notify an external controller (EC) of audio parameters.
  • the EC may confirm the audio parameters sent from the scalar subsystem via I2C.
  • the EC may adjust audio volume value or audio mute status in response to the press of the OSD key or the IR remote control.
  • the audio volume value and the audio mute status may be kept in a non-volatile memory of the scalar subsystem, such as the EEPROM.
  • the default value of the audio volume value may be 70, and the default value of the audio mute status may be “not mute” .
  • FIG. 8 is a flow chart illustrating an example process 800 of controlling video parameters via a first control component when external AV signals are played on a media playing device.
  • a scalar subsystem may receive video control signals from the first control component.
  • the scalar subsystem may set video parameters of a video output device.
  • the video parameters may be backlight brightness value kept in a non-volatile memory of the scalar subsystem, having a default value of 100.
  • FIG. 9 is a flow chart illustrating an example process 900 of controlling audio parameters via a second control component when external AV signals are played on a media playing device.
  • a display control unit may receive audio control signals from the second control component.
  • the second control component may be a Bluetooth (BT) remote control, or a USB port for connecting such as a keyboard, a mouse, etc.
  • the display control unit may send an audio control command through a display data channel command interface (DDC-CI) to the scalar subsystem.
  • the audio control command may include audio parameters such as audio volume value and/or audio mute status.
  • the scalar subsystem may issue an interrupt command to notify an EC of the audio parameters.
  • DDC-CI display data channel command interface
  • the EC may read the audio parameters through I2C.
  • the EC may send the audio volume value via I2C to a speaker amplifier and/or to an audio DSP.
  • the speaker amplifier may take audio volume control for speakers.
  • the audio DSP and a headphone amplifier may take audio volume control for a headphone.
  • the EC may send the audio mute status through I2C to the speaker amplifier and/or to the audio DSP.
  • the speaker amplifier may take the audio mute control for speakers.
  • the audio DSP and the headphone amplifier may take the audio mute control for the headphone.
  • Blocks 905-910 relate to the adjustment of the audio parameters for audio output devices through I2C, including operations such as setting the audio volume value and/or changing the audio mute status.
  • FIG. 10 is a flow chart illustrating an example process 1000 of controlling video parameters via a second control component when external AV signals are played on a media playing device.
  • a display control unit may receive video control signals from the second control component.
  • the display control unit may send video parameters to the scalar subsystem through DDC-CI.
  • the scalar subsystem may set backlight brightness of a video output device according to the video parameters.
  • FIG. 11 is a flow chart illustrating an example process 1100 of controlling audio parameters via a first control component when internal AV signals are played on a media playing device.
  • a scalar subsystem may receive audio control signals from the first control component.
  • the scalar subsystem may issue an interrupt command to notify an EC of audio parameters.
  • the EC may confirm the audio parameters received from the scalar subsystem via I2C.
  • the EC may send the audio parameters to an operating system (OS) of the computer subsystem.
  • the OS may take the control of an audio output device.
  • the process of controlling video parameters via a first control component when internal AV signals are played on a media playing device may be similar to that shown in FIG. 11.
  • the video parameters may include backlight brightness value of a video output device.
  • FIG. 12 is a flow chart illustrating an example process 1200 of switching from playing internal AV signals or no display to playing external AV signals.
  • a scalar subsystem may issue an interrupt command to notify an EC about switching a media playing device to play the external AV signals.
  • the EC may confirm the switching sent from the scalar subsystem via I2C.
  • the EC may read a new audio sampling rate from the scalar subsystem.
  • the EC may compare a previous audio sampling rate with the new audio sampling rate.
  • the EC may reload a DSP firmwarecorresponding to the new audio sampling rate to an audio DSP when the previous and new audio sampling rates are different.
  • the DSP firmware may have 44.1khz or 48khz sampling rate.
  • the EC may read audio parameters of the external media source previously stored in the scalar subsystem.
  • the EC may send the external audio parameters previously stored to a speaker amplifier and/or to an audio DSP via I2C.
  • the scalar subsystem may restore the external video parameters previously stored.
  • default audio parameters and video parameters may be set according to latest configurations of the external media source stored on the scalar subsystem.
  • external AV parameters may be stored on the scalar subsystem when a change of the external AV parameters occurs during the play of the external AV signals.
  • the external AV parameters may be recorded by the scalar subsystem for future use even when the playing of the external AV signals is terminated.
  • the external AV parameters previously stored may be used.
  • FIG. 13 is a flow chart illustrating an example process 1300 of switching from playing external AV signals or no display to playing internal AV signals.
  • a scalar subsystem may issue an interrupt command to notify an EC about switching display from the external AV signals or no display to the internal AV signals.
  • the EC may confirm the switching via I2C.
  • the EC may determine whether an audio sampling rate of the external AV signals is 48khz.
  • the EC may reload a DSP firmware with 48khz to an audio DSP for playing the internal audio signals when the external AV signals don’t have the audio sampling rate of 48khz.
  • the EC may send a command to a display control unit.
  • the display control unit may read audio parameters and video parameters of the internal AV signals previously stored in the scalar subsystem through DDC-CI.
  • the audio parameters and video parameters of the internal AV signals may previously be stored in the scalar subsystem when there is a change on the audio and video parameters during the display of the internal AV signals.
  • the display control unit may set the audio output device and the video output device to match the audio and video parameters previously stored in the scalar subsystem.
  • the scalar subsystem may switch the audio output device and the video output device to the internal AV signals.
  • FIG. 14 is a block diagram illustrating a system 1400 in accordance with an example of the present disclosure.
  • the implementation of the system 1400 may refer to such as FIGS. 1-13 for details.
  • the system 1400 may include: a first computing device 1401 and an external media source 1402.
  • the first computing device 1401 may include: an AV processor 1411, a computer part 1421, a display 1431, an audio playing unit 1441, and a first control component 1451.
  • the AV processor 1411 may include an AV input port 1461.
  • the first control component 1451 is coupled to the AV processor 1411.
  • the external media source 1402 is coupled to the AV input port 1461.
  • the external media source 1402 may transmit external AV signals to the AV processor 1411 under the control of the first control component 1451.
  • the AV processor 1411 is to split the external AV signals into external audio signals and external video signals, transmit the external audio signals to the audio playing unit 1441, and transmit the external video signals to the display 1431, when the external media source is selected.
  • the computer part 1421 when the external media source is selected, the computer part 1421 may be powered on, or powered off.
  • the external media source 1402 may occupy the display 1431 and the audio playing unit 1441 if a user selects to display the external media source 1402 via such as the first control component 1451.
  • the external media source is selected from the group including: a game console, a media player, a set-top box, a digital television, a smart phone, and a second computing device distinct from the first computing device 1401.
  • the first computing device 1401 may further include: a second control component 1471 coupled to the computer part 1421.
  • the second control component 1471 is to control audio parameters of the audio playing unit 1441 and video parameters of the display 1431 when the computer part 1421 is powered on.
  • the first computing device 1401 may further include: an external controller 1481, to act as a master for transmitting control signals to the AV processor 1411 and the computer part 1421.
  • the external controller 1481 may send the control signals via I2C.
  • the external controller 1481 may be configured as a master of the I2C, and other components may be configured as slaves of the I2C.
  • FIG. 15 is a block diagram illustrating a computer readable storage medium 1500 in accordance with an example of the present disclosure.
  • the computer readable storage medium 1500 may be a non-transitory computer-readable storage medium.
  • the computer readable storage medium 1500 may be a magnetic disk storage device, a flash memory device, or other non-volatile or non-transitory solid state memory devices.
  • the implementation of the computer readable storage medium 1500 may refer to such as FIGS. 1-14 for details.
  • the computer readable storage medium 1500 may include instructions that when executed cause a controller of an electronic device to: determine whether a source selection indicator represents an external media source not integrated within the electronic device or an internal media source included in the electronic device (block 1501) .
  • the instructions may further cause the controller to: receive external audio and video (AV) signals from an AV processor of the electronic device when the source selection indicator represents the external media source (block 1502) , wherein the AV processor is coupled to the external media source.
  • the instructions may further cause the controller to: split the external AV signals into external audio signals and external video signals by the AV processor (block 1503) .
  • the instructions may further cause the controller to: provide the external audio signals to an audio output device, and provide the external video signals to a video output device (block 1504) .
  • the instructions may further cause the controller to: receive control signals from a first control component and/or a second control component of the electronic device, and transmit the control signals to the audio output device and/or the video output device (block 1505) .
  • the first control component is connected to the AV processor of the electronic device, and the second control component is connected to a computer part of the electronic device.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

L'invention concerne un exemple de dispositif électronique (100) comprenant : un processeur (101) audio et vidéo (AV), un système auxiliaire informatique (102), un mécanisme de commande (104) et un dispositif de lecture multimédia (103). Le processeur AV (101) comprend un port d'entrée AV (111) pour recevoir des signaux AV externes depuis une source multimédia externe. Le système auxiliaire informatique (102) est destiné à fournir des signaux AV internes au processeur AV (101). Le mécanisme de commande (104) est destiné à commander le processeur AV (101) pour sélectionner entre les signaux AV externes et les signaux AV internes et permettre au processeur AV (101) de transmettre les signaux AV sélectionnés au dispositif de lecture multimédia (103). Le dispositif de lecture multimédia (103) est destiné à lire les signaux AV sélectionnés.
PCT/CN2015/079154 2015-05-18 2015-05-18 Processeurs audio et vidéo Ceased WO2016183763A1 (fr)

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PCT/CN2015/079154 WO2016183763A1 (fr) 2015-05-18 2015-05-18 Processeurs audio et vidéo
US15/557,026 US10846041B2 (en) 2015-05-18 2015-05-18 Audio and video processors
TW105113655A TWI651643B (zh) 2015-05-18 2016-05-02 音訊與視訊處理器

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US10846041B2 (en) 2020-11-24
TWI651643B (zh) 2019-02-21
US20180095706A1 (en) 2018-04-05

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